Double pressure protection device of asphalt aging tester

Abstract

The utility model discloses a kind of double pressure protection devices of asphalt ageing tester, including base, heating furnace is equipped on the base, pressure vessel is placed on heating furnace, pressure vessel is equipped with sealing cover, sealing cover is equipped with a safety valve;The sidewall of the pressure vessel is connected with gas supply line, safety bursting disc is installed on gas supply line.The utility model in the present application, safety bursting disc is installed on gas supply line, when pipeline pressure is abnormally increased to 2.5MPa, it is automatically burst;Safety valve is installed on the sealing cover of pressure vessel, when the pressure in container is abnormally increased to 2.5MPa, it is automatically opened.The utility model is protected by double independent protection mechanism, respectively protects gas supply line and pressure vessel, avoids the security risk caused by pressure overrun, with the characteristics of simple structure, low in cost, high safety, applicable to various asphalt pressure ageing tester.

Description

Technical Field

[0001] This utility model relates to the technical field of asphalt performance testing equipment, specifically a dual pressure protection device for an asphalt aging tester. Background Technology

[0002] The asphalt pressure aging test refers to the process of placing an asphalt sample in a specified container, placing it inside a sealed pressure vessel, and applying a specified pressure and heating it to a specified high temperature to accelerate the aging of the sample. This method simulates the oxidative aging process that occurs in asphalt during road use and is used to evaluate the resistance of different asphalts to oxidative aging under test temperature and pressure conditions.

[0003] The "T 0630 Accelerated Asphalt Aging Test in Pressure Aging Vessels" in the "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering" specifies the requirements for asphalt pressure aging tests.

[0004] The asphalt pressure aging tester is designed and manufactured in accordance with the requirements of "T 0630 Accelerated Asphalt Aging Test for Pressure Aging Containers" and is a specialized instrument for asphalt pressure aging testing.

[0005] The "T 0630 Accelerated Asphalt Aging Test for Pressure Aging Vessels" stipulates:

[0006] 1. The pressure inside the pressure vessel is provided by a compressed air cylinder. The output end of the compressed air cylinder should have a pressure regulator to control the pressure in the vessel to ±0.02MPa, and during the aging process, the pressure in the vessel should be controlled at 2.1MPa±0.1MPa.

[0007] 2. The pressure requirement for normal pressure application and heating aging tests of pressure vessels is 2.1MPa±0.1MPa, and the pressure in the vessel during the aging process should not exceed 2.5MPa.

[0008] 3. A pressure reducing valve is installed at the pressure vessel end. The pressure signal inside the pressure vessel is fed back to the control end of the pressure reducing valve to control the operation of the pressure reducing valve and prevent the pressure in the vessel from exceeding 2.5 MPa.

[0009] 4. The aging temperature control range inside the pressure vessel is 90℃~110℃, and the temperature control requirement is ±0.5℃.

[0010] Therefore, under normal circumstances, in order to carry out the asphalt pressure aging test normally, and to ensure the safety of the air supply pipeline and the pressure test container during the test, the pressure regulator at the output end of the compressed air cylinder at the air supply end and the pressure reducing valve at the pressure vessel end are two essential components that must be installed in the asphalt pressure aging tester when conducting pressure aging tests on asphalt samples; and the automatic control of the aging temperature inside the pressure vessel is also a necessary condition for the normal operation of the instrument.

[0011] Existing defects and shortcomings:

[0012] 1. Because a pressure regulator is installed in the gas supply line and a pressure reducing valve is installed at the pressure vessel end, normal pressure aging tests of asphalt samples can be achieved under conditions of manual intervention and pressure signal feedback. However, during normal testing, the safety of the gas supply line and pressure vessel relies excessively on manual intervention and the quality of the components is insufficient.

[0013] 2. Due to the lack of effective safety protection measures for gas pipelines and pressure vessels, any abnormal operation of the pressure regulator or pressure reducing valve may cause an abnormal increase in pressure in the gas pipeline or pressure vessel, posing a safety hazard.

[0014] 3. Due to the lack of effective safety protection measures for gas pipelines and pressure vessels, if the aging temperature control inside the pressure vessel becomes abnormal, it will cause an abnormal increase in pressure inside the pressure vessel, which also poses a safety hazard.

[0015] 4. Due to the aforementioned shortcomings and potential risks, the instrument as a whole suffers from low safety in its use.

[0016] Therefore, developing a dual pressure protection device for an asphalt aging tester has become an urgent problem for those skilled in the art. Utility Model Content

[0017] To address the shortcomings of existing technologies, this utility model aims to provide a dual pressure protection device for an asphalt aging tester. By setting independent pressure protection devices on the air supply pipeline and pressure vessel respectively, dual safety protection is achieved, thereby improving the safety of equipment operation.

[0018] The above-mentioned objective of this utility model is achieved through the following technical solution: a dual pressure protection device for an asphalt aging tester, comprising a base, a heating furnace on the base, a pressure vessel placed on the heating furnace, a sealing cover on the pressure vessel, and a safety valve on the sealing cover; the side wall of the pressure vessel is connected to an air supply pipeline, one end of the air supply pipeline is set as an air inlet, and a safety rupture disc is installed on the air supply pipeline.

[0019] Furthermore, the gas supply line is connected to a support rod and supported on the base by the support rod.

[0020] Furthermore, the base is provided with feet at its bottom.

[0021] Furthermore, the sealing cover is equipped with a pressure sensor and a pressure controller to monitor the pressure inside the pressure vessel in real time and feed it back to the pressure regulator, thereby achieving closed-loop pressure control.

[0022] In this utility model,

[0023] Air supply line: The input end is connected to a compressed air cylinder, and the output end is connected to a pressure vessel for supplying compressed air; the input end is equipped with a pressure regulator to control the output pressure at 2.3MPa-2.4MPa, ensuring that the working pressure of the pressure vessel is maintained at 2.1MPa±0.1MPa.

[0024] Safety rupture disc: Installed on the gas supply pipeline, its preset burst pressure is 2.5MPa±0.05MPa; when the pressure in the gas supply pipeline rises abnormally to the burst pressure due to reasons such as pressure regulator failure, the safety rupture disc will burst immediately, releasing the pipeline pressure and protecting the safety of the gas supply pipeline.

[0025] Pressure vessel: Used to hold asphalt samples, with a maximum design pressure of not less than 2.75 MPa (verified by hydrostatic test); it is equipped with a sealing cap on top to ensure a sealed test process.

[0026] Safety valve: Installed on the sealing cover of the pressure vessel, with a preset opening pressure of 2.5MPa±0.05MPa; when the pressure inside the pressure vessel exceeds the opening pressure due to abnormal heating or other reasons, the safety valve will automatically open to release the pressure inside the vessel and protect the safety of the pressure vessel.

[0027] Heating furnace: Located at the bottom of the pressure vessel, controlled by a temperature controller (in conjunction with a temperature sensor), stabilizing the temperature inside the vessel at 90℃-110℃ with an accuracy of ±0.5℃.

[0028] Base: Used to fix all the above components and ensure the overall stability of the equipment.

[0029] In this utility model, the selection of pressure protection devices is as follows:

[0030] 1. Selection of pressure protection devices for gas supply lines:

[0031] Considering that compressed air is supplied to the pressure vessel through a supply pipeline, the working pressure in the pressure vessel should be controlled at 2.1MPa ± 0.1MPa, and the force in the vessel during aging should not exceed 2.5MPa. Therefore, a qualified safety rupture disc is selected as the pressure protection device for the supply pipeline.

[0032] 2. Selection of pressure protection devices for pressure vessels:

[0033] Considering that the pressure requirement for normal pressurization and heating aging tests of pressure vessels is 2.1 MPa ± 0.1 MPa, and the pressure inside the pressure vessel during the aging process should not exceed 2.5 MPa, and since the maximum design pressure of the pressure vessel is not less than 2.75 MPa (requiring a 2.75 MPa hydrostatic test to be passed), an automatically opening safety valve that meets the requirements is selected as the pressure protection device for the pressure vessel.

[0034] The advantages of this utility model compared with the prior art are:

[0035] 1. It has the advantages of reasonable design and effective protection for the safety of gas supply pipelines and pressure vessels:

[0036] This utility model employs the installation of a safety protection device on both the gas supply pipeline and the pressure vessel, enabling automatic pressure release when the pressure in either the gas supply pipeline or the pressure vessel abnormally increases, thus preventing damage to the gas supply pipeline or the pressure vessel. It has the advantages of reasonable design and effective protection for the safe use of the gas supply pipeline and the pressure vessel.

[0037] 2. It has the advantages of low cost and high cost performance:

[0038] The components used in this invention are conventional and common, easy to purchase, and convenient to install. They can effectively protect the safety of instruments at a relatively low cost, and have the advantages of low cost and high cost performance.

[0039] 3. It has the advantages of safe instrument use, eliminating reliance on manual operation and the reliability of individual components:

[0040] This utility model employs a safety protection device installed on both the gas supply pipeline and the pressure vessel. Regardless of the cause, if the pressure in the gas supply pipeline or the pressure vessel exceeds the limit, the pressure in the gas supply pipeline or the pressure vessel will be automatically released, effectively protecting the safety of the gas supply pipeline or the pressure vessel. It has the advantages of eliminating reliance on manual operation and ensuring the reliability of individual components for safe use of the instrument.

[0041] 4. It has the advantage of improving the safety of instrument use:

[0042] When applied to an asphalt pressure aging tester, this invention effectively protects the safety of the air supply pipeline and pressure vessel, thereby protecting the safety of the instrument and enhancing its operational safety. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the structure of this utility model.

[0044] Figure 2 This is a schematic diagram of the structure of the utility model applied to the asphalt pressure aging tester. Detailed Implementation

[0045] The present invention will now be described in further detail with reference to the accompanying drawings.

[0046] like Figure 1As shown, a dual pressure protection device for an asphalt aging tester includes a base 109 with feet 110 at the bottom. A heating furnace 108 is mounted on the base 109, and a pressure vessel 107 is placed on the heating furnace 108. The pressure vessel 107 has a sealing cover 105 and a safety valve 106. A pressure sensor and a pressure controller are installed as needed to monitor the pressure inside the pressure vessel in real time and feed the feedback to a pressure regulator to achieve closed-loop pressure control. An air supply pipeline 103 is connected to the side wall of the pressure vessel 107. One end of the air supply pipeline 103 is designated as an air inlet 101. The air supply pipeline 103 is connected to a support rod 102 and supported on the base 109 by the support rod 102. A safety rupture disc 104 is installed on the air supply pipeline 103.

[0047] The implementation method of this utility model applied to an asphalt pressure aging tester is as follows: Figure 2 As shown in (partial sectional view). Figure 2 middle:

[0048] Inlet 201 is the inlet for pressurized gas supplied to pressure vessel assembly 213 by compressed air cylinder.

[0049] The instrument frame 202 is used to house the main instrument body.

[0050] The instrument panel frame 203 is located on the left side of the front of the instrument frame, and a pressure controller 204, a temperature controller 205, and a control panel 206 are mounted on it.

[0051] Pressure controller 204 is a control device for setting and controlling the test pressure in the pressure vessel of pressure vessel assembly 213.

[0052] Temperature controller 205 is a control device for setting and controlling the test temperature in the pressure vessel of pressure vessel assembly 213.

[0053] Control panel 206, equipped with switches, knobs, buttons, etc., is the control panel for operating the instrument.

[0054] Safety rupture disc 207, a pressure protection device for the gas supply pipeline of this utility model.

[0055] Vent hole 208, a through hole corresponding to safety valve 209, runs through the top plate of instrument frame 202 and instrument cover plate 210, and is used to release pressurized gas once safety valve 209 is opened.

[0056] Safety valve 209, pressure protection device of pressure vessel assembly 213 of this utility model.

[0057] The instrument cover 210 is a cover with a handle that can be opened upwards. A circular hole larger than the diameter of the pressure vessel is opened on the top plate of the instrument outer frame 202 below the cover to facilitate operation during the experiment.

[0058] Pressure sensor 211, connected to pressure controller 204, is used to detect the pressure inside the pressure vessel of pressure vessel assembly 213 in real time.

[0059] Temperature sensor 212, connected to temperature controller 205, is used to detect the temperature inside the pressure vessel of pressure vessel assembly 213 in real time.

[0060] The pressure vessel assembly 213 consists of an electric heating furnace at the bottom, a cylindrical pressure vessel in the middle, a sealing cover at the top, and a safety valve, pressure sensor, temperature sensor, etc. installed on the sealing cover.

[0061] There are four feet (214) installed at the bottom of the instrument to support the entire weight of the instrument body.

[0062] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A dual pressure protection device for an asphalt aging tester, comprising a base, characterized in that: The base is equipped with a heating furnace, and a pressure vessel is placed on the heating furnace. The pressure vessel is equipped with a sealing cover and a safety valve. A gas supply pipeline is connected to the side wall of the pressure vessel. One end of the gas supply pipeline is set as an air inlet, and a safety rupture disc is installed on the gas supply pipeline.

2. The dual pressure protection device for an asphalt aging tester according to claim 1, characterized in that: The gas supply line is connected to a support rod and supported on the base by the support rod.

3. The dual pressure protection device for an asphalt aging tester according to claim 1, characterized in that: The base is equipped with feet at the bottom.

4. The dual pressure protection device for an asphalt aging tester according to claim 1, characterized in that: A pressure sensor is installed on the sealing cover.

5. The dual pressure protection device for an asphalt aging tester according to claim 1, characterized in that: The sealing cap is equipped with a pressure controller.

Images